Mulching attachment for a lawn mower



FIG. 1 is a bottom perspective view of a mulching attachment for a lawn mower showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a side elevational view thereof, the adjacent and opposite sides being identical in appearance. 

The ornamental design for a mulching attachment for a lawn mower, as shown and described. 